lsi sas2308

Have old six-drive six SAS/SATA ports cage, seems it designed for 3Gbps PHY and have no any logic (expander) onboard to report correct PHY capabilities to controller. Found that SAS2308 with SATA3 drives on that cage fail on commands. Switched to MB onboard SATA-3 ports - problem exists (see...

Here's my question in a nutshell: what are the benefits, if any, in upgrading SAS2008 cards to SAS2308 cards, besides offering PCIE 3.0 bandwidth and being capable of handling more devices (1024 vs 512)? If you had a server that only supported PCIE 2.0, containing several SAS2008 cards running...